/**
 * 文档注释
 */
public class Test {
    public static void main(String[] args) {
        /*
        块注释
         */

        //行注释

    }


    public static void main1(String[] args) {
        /*short a =128;
        byte b =(byte) a;
        System.out.println(a);
        System.out.println(b);*/

        /*int  a = 3;
        byte b = a;//err*/

        /*byte a = 130;//int
        float b = 3.5;//double*/
    }
}